First Trial of the Pyx, a procedure for measuring the standard of minted coins, held.
1283
25 April - The last independent Welsh stronghold, Castell y Bere, falls to the English.
28 June - A Parliament of England summoned to assemble at Shrewsbury Abbey to decide the fate of the captured Dafydd ap Gruffydd is the first to include commoners.
3 October - The last ruler of an independent Wales, Prince Dafydd ap Gruffydd, is executed in Shrewsbury, the first prominent person in history to be hanged, drawn and quartered (for the newly created crime of high treason).
5 November - An official of Exeter Cathedral, Walter Lechlade, is murdered in its close in a conspiracy ordered by the Dean, John Pycot, and the city's mayor, Alured de Porta.
February - South England flood, affecting the Cinque Ports: A storm surge destroys the town of Old Winchelsea on Romney Marsh and nearby Broomhill. The course of the nearby River Rother is diverted away from New Romney, which is almost destroyed, ending its role as a port, with the Rother running instead to the sea at Rye, whose prospects as a port are enhanced. A cliff collapses at Hastings, ending its role as a trade harbour and demolishing part of Hastings Castle. New Winchelsea is established on higher ground.
